Details on how to get the 'Terminal Velocity' achievement (fall 30k feet) including screenshots and alternate methods....

HOW TO GET HALF LIFE WEAPONS IN PORTAL

作者： Mµshroomlµver456

THIS GUIDE WILL SHOW YOU HOW TO GET HALF LIFE WEAPONS IN PORTAL.
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Portal Multiplayer Guide!

作者： ⁢⁢

What?! Multiplayer in Portal? Yes, that is possible and is actually really simple. On this guide, I will be teaching you how to create a multiplayer server. You will need to know how to open up the developer console. Just right click on Portal, go to prop...

Floating Portal "Orb" Glitch!!!

作者： __Search__

Step-by-step guide on how to get glowing orbs anywhere!...

Passing all Chambers (Walkthroughs)

作者： Paul the Burrito

This guide will be showing all my walkthrough's for Portal that i have posted on youtube and on Steam....

The following text contains spoilers . This is a basic plot outline for those who are confused by the goings-on in the Enrichment Center.
Aperture Laboratories is a science company which, among other inventions created the A...